1311020653 has 8 divisors (see below), whose sum is σ = 1384123520. Its totient is φ = 1238328000.

The previous prime is 1311020591. The next prime is 1311020681. The reversal of 1311020653 is 3560201131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311020653 - 2²¹ = 1308923501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311020693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95973 + ... + 108778.

It is an arithmetic number, because the mean of its divisors is an integer number (173015440).

Almost surely, 2^1311020653 is an apocalyptic number.

It is an amenable number.

1311020653 is a deficient number, since it is larger than the sum of its proper divisors (73102867).

1311020653 is a wasteful number, since it uses less digits than its factorization.

1311020653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205107.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1311020653 is about 36208.0191808389. The cubic root of 1311020653 is about 1094.4682761359.

Adding to 1311020653 its reverse (3560201131), we get a palindrome (4871221784).

The spelling of 1311020653 in words is "one billion, three hundred eleven million, twenty thousand, six hundred fifty-three".